Buffer selection for 3.3V bus interfaces
The SN74LVT244BPWR: It drives up to 32 mA source and 64 mA sink per output, which is enough to fan out to multiple CMOS or TTL loads on a shared bus without external line drivers.
20-TSSOP board-fit and supply rails
Housed in a 20-TSSOP package with 0.65 mm pitch and 4.40 mm body width, the SN74LVT244BPWR mounts on standard surface-mount pads. The 20-pin footprint is common across the 74LVT and 74LVC families, so a layout designed for this part can often accept a pin-compatible sibling without a board spin.